{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure data security?","a":"Encryption algorithm: Blockchain technology uses encryption algorithms (such as SHA-256) to protect the privacy and security of data. Each participant has a private key and a public key, with the private key used to sign transaction records and the public key used to verify signatures. This encryption technology can  effectively prevent fraud and tampering."}]}],"pr":"cd0db9daeeafe1015d8be604b5bdafcb709ac5ec74ce4ce0ee78d2f3268ca322"}